ASTM D7170-2009 346 Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils&x2014 Fixed Range Injection Period Constant Volume Combustion Chamber .pdf
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1、Designation: D 7170 09An American National StandardStandard Test Method forDetermination of Derived Cetane Number (DCN) of DieselFuel OilsFixed Range Injection Period, Constant VolumeCombustion Chamber Method1This standard is issued under the fixed designation D 7170; the number immediately followin
2、g the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method co
3、vers the quantitative determinationof the ignition characteristics of conventional diesel fuel oils,diesel fuel oils containing cetane number improver additives,and is applicable to products typical of Specification D 975,Grades No. 1-D and 2-D regular and low-sulfur diesel fuel oils,European standa
4、rd EN 590, and Canadian standards CAN/CGSB-3.517-2000 and CAN/CGSB 3.6-2000. The test methodmay also be applied to the quantitative determination of theignition characteristics of blends of fuel oils containing biodie-sel material, and diesel fuel oil blending components.1.2 This test method measure
5、s the ignition delay and utilizesa constant volume combustion chamber with direct fuel injec-tion into heated, compressed air. An equation converts anignition delay determination to a derived cetane number(DCN).1.3 This test method covers the ignition delay range from aminimum value of 35.0 DCN (ign
6、ition delay of 4.89 ms) to amaximum value of 59.6 DCN (ignition delay of 2.87 ms). Theaverage DCN result for each sample in the ILS ranged from37.29 (average ignition delay of 4.5894 ms) to 56.517 (averageignition delay of 3.0281 ms).1.4 The values stated in SI units are to be regarded asstandard. N
7、o other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bil
8、ity of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 613 Test Method for Cetane Number of Diesel Fuel OilD 975 Specification for Diesel Fuel OilsD 1193 Specification for Reagent WaterD 4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD 4175 Termi
9、nology Relating to Petroleum, PetroleumProducts, and LubricantsD 4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD 5854 Practice for Mixing and Handling of LiquidSamples of Petroleum and Petroleum ProductsD 6299 Practice for Applying Statistical Quality Assuranceand Control Ch
10、arting Techniques to Evaluate AnalyticalMeasurement System PerformanceD 6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD 6708 Practice for Statistical Assessment and Improve-ment of Expected Agreement Between Two Test Methodsthat
11、 Purport to Measure the Same Property of a MaterialE 456 Terminology Relating to Quality and StatisticsE 832 Specification for Laboratory Filter Papers2.2 EN Standard:3EN 590 Automotive FuelsDieselRequirements andTest Methods2.3 Energy Institute Standard:4IP 41 Ignition Quality of Diesel FuelsCetane
12、 Engine TestMethod1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.01 on Combustion Characteristics.Current edition approved April 15, 2009. Published June 2009. Originallyapproved in 2006. Last
13、previous edition approved in 2008 as D 717008.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from
14、 European Committee for standardization. Central Secretariat:rue de Stassart, 36, B-1050 Brussels, Belgium.4Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,U.K.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Driv
15、e, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.4 Canadian Standards:5CAN/CGSB-3.517-2000 Regular Sulphur Diesel FuelSpecificationCAN/CGSB 3.6-2000 Automotive Low-Sulphur DieselFuelSpecification2.5 DIN Standard:6DIN 73372 Einspritzdsen Grsse T und U3. Terminology3.1 Definitions:3.1
16、.1 accepted reference value (ARV), na value thatserves as an agreed-upon reference for comparison and that isderived as (1) a theoretical or established value, based onscientific principles, (2) an assigned value, based on experi-mental work of some national or international organization,such as the
17、 U.S. National Institute of Standards and Technol-ogy (NIST), or (3) a consensus value, based on collaborativeexperimental work under the auspices of a scientific orengineering group. E 4563.1.1.1 DiscussionIn the context of this method, acceptedreference value is understood to apply to the ignition
18、 delay ofspecific reference materials determined under reproducibilityconditions by collaborative experimental work.3.1.2 cetane number, na measure of the ignition perfor-mance of a diesel fuel oil obtained by comparing it to referencefuels in a standardized engine test. D 41753.1.2.1 DiscussionIn t
19、he context of this method, cetanenumber is that defined by ASTM D 613/IP 41.3.1.3 check standard, nin QC testing, a material havingan accepted reference value used to determine the accuracy ofa measurement system. D 62993.1.3.1 DiscussionIn the context of this test method,check standard refers to he
20、ptane.3.1.4 quality control (QC) sample, nfor use in qualityassurance programs to determine and monitor the precision andstability of a measurement system, a stable and homogeneousmaterial having physical or chemical properties, or both,similar to those of typical samples tested by the analyticalmea
21、surement system. The material is properly stored to ensuresample integrity, and is available in sufficient quantity forrepeated, long term testing. D 62993.2 Definitions of Terms Specific to This Standard:3.2.1 calibration reference material, na pure chemicalhaving an assigned ignition delay accepte
22、d reference value.3.2.2 charge air, ncompressed air at a specified pressureintroduced into the combustion chamber at the beginning ofeach test cycle.3.2.3 charge air temperature, ntemperature, in C, of theair inside the combustion chamber.3.2.4 combustion analyzer, nan integrated compressionignition
23、 apparatus to measure the ignition characteristics ofdiesel fuel oil.3.2.5 derived cetane number (DCN), na number calcu-lated using a conversion equation that relates a combustionanalyzer ignition delay result to cetane number.3.2.6 ignition delay (ID), nthat period of time, in milli-seconds (ms), b
24、etween the start of fuel injection and the start ofcombustion as determined using the specific combustion ana-lyzer applicable for this test method.3.2.6.1 DiscussionIn the context of this test method, startof fuel injection is interpreted as the initial movement or lift ofthe injector nozzle needle
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